Peter j



P. J. HOENSGHEID. SELF 01mm DRILL.

No. 580,399. Patented Apr. 13,'1897.

PETER J. HOENSOI-IEID, OF AKRON, OHIO, ASSIGNOR TO THE WHITMAN dz BARNESMANUFACTURING COMPANY, OF SAME PLACE.

SE'LF-OILING DRILL.

SPECIFICATION forming part of Letters Patent No. 580,399, dated April13, 1897.

Application filed January 4, 1897. Serial No. 617,909. (No model.)

To aZZ whom it may concern.-

Be it known that 1, PETER J. HOENSCHEID, a citizen of the United States,residing in the city of Akron, county of Summit, and State of Ohio, haveinvented a certain new and useful Improvement in Self-Oiling Drills, ofwhich the following is a full, clear, and exact description, referencebeing bad to the accompanying drawings.

My invention relates to self -oiling drills; and its object is toprovide a drill having an oil-conduit leading to the working point, witheconomical and convenient means of supplying oil to that conduit.

The invention consists in the combination, with such a drill, of a cupsurrounding the drill-shank and revolving with the drill and supplyingoil to the conduit.

The drawings show my invention embodied in the best form at presentknown to me.

Figure 1 is an elevation of a complete drill containing the invention.Fig. 2 is a transverse section on the line 2 2 of Fig. 1, showing theoil-conduit. Fig. 3 is a view of the drill-shank, being taken at rightangles to Fig. 1 and its lower portion being a section on the line 3 3of Fig. 1. Fig. 4 is a plan of the oil-cup. Fig. 5 is an elevationshowing the oil-cup applied to a form of drill-shank prefo erable incertain cases.

Similar reference-letters designate similar parts in each figure.

A is a twist-drill having a shank B, which may be cylindrical or taperedor formed in other suitable manner. Carried by the body of the drill isthe oil-conduit, which I form by making a groove 0 therein and coveringthe outside of the same in any suitable manner by a strip of metal d,preferably brass.

0 The grooves 0 (preferably two in number) may terminate in the diagonaltubular holes 6. (Shown in Fig. 3.) Such holes continue the conduit fromthe surface grooves to the transverse hole f, extending through thedrilland 5 communicating at each end with the annular groove g. Thus oilsupplied to this annular groove will flow through the holes f and e andthe grooves c and reach the working point of the drill.

Oil is supplied to the drill by a cup j, surrounding the drill androtating with it. This cup is slipped in place over the end of the drilland may rest on a shoulder s on the drill-, shank. The cup has an innerflange m, which closely embraces the shank. Notches n in this flangeallow oil carried by the cup to flow into the groove 9. Oil may besupplied to the cup by a continuous drip or in other manner,

as desired.

The construction of drill and cup just described I consider preferablein the larger sizes of drills. It does not require the oilcup beingplaced with its notches in any absolute position with reference to theentrance to the conduit, and the drill is adapted to receive in place ofthe cup the oil collar shown and described in my application filedOctober 7, 1896, Serial No. 608,149. I do not in this applicationspecifically claim thecombination of the holes 6 and f and the groove 9,but reserve that to the application above referred to. In small drills,however, where it is not desirable to make the holes 6 and f in theshank, I supply the oil directly to the surface grooves from the cup.Such 0011- struction is shown in Fig. 5. Here the strip cl does notreach the top of the grooves, and 1 hence leaves an opening 0 into thelatter. The cup is fitted on the shank with its notches n directlyopposite these openings into the grooves. The shank shown in Fig. 5 istapered in the neighborhood of the upper end of the grooves, and therotating cup is thereby securely held in place without the necessity ofthe shoulders. This construction has the advantage that the supply ofoil to the conduit may be regulated by turning the cup slightly aboutthe drill-shank, thus causing the flange m to cover the opening 0 to agreater or less extent. Should it be deemed advantageous go to Waivethis regulation in favor of construction not requiring an absoluteposition of the cup, an annular groove may be made on the inner surfaceof the flange m and thus cooperate with the openings 0. Such annular 5groove may also be substituted for the groove g, if desired, in theconstruction hereinbefore described, the hole f in that case continuingto the cylindrical surface of the shank.

Having thus described my invention, what I claim is 1. A drill having anoil-conduit inclosed Within the drill leading from the periphery of itsshank to or near to the Working point, in combination With a cup fittingover and surrounding the drill-shank revolving With it and supplying oilto the conduit, for the purpose specified.

2. A drill having an oil-conduit leading from the periphery of its shankto or near to the Working point, in combination With a cup revolvingwith the drill and having a vertical flange embracing the shank, therebeing a notch in said flange through Which oil carried by said cup maypass to said conduit, substantially as described.

3. A drill having an oil-conduit consisting of a groove extending fromthe shank to or near to-the Working point and a strip coverin g saidgroove but leaving an opening thereinto on the surface of the shank, incombination With an oil-cup surrounding said drill and having a flangeembracing the shank, there being a notch in said shank cooperating withthe opening into the conduit, whereby the supply of oil from the cup tothe conduit may be regulated by changing the presentation of the cup tothe drill, substantially as described.

PETER J. HOENSCHEID.

Witnesses:

GEO. O. OoUeER, CHARLES L. FRUMFELTER.

